Alloy L 605 UDIMET® L 605 – UNS R30605 / ASTM B435, B572, B366
Alloy L 605 UDIMET® L 605
Alloy L 605 UDIMET® L 605 is a cobalt -chromium-tungsten -nickel based alloy , known for its excellent mechanical strength at high temperatures and oxidation resistance up to 1093°C (2000°F).
This alloy offers excellent resistance to sulfidation , wear and seizure , making it ideal for applications in the aerospace, gas turbine and industrial furnace industries.
Due to its mechanical strength and ability to maintain hardness even after prolonged exposure to high temperatures, Alloy L 605 is used for rings, blades and combustion chamber parts in gas turbines, as well as for internal linings of high-temperature furnaces.
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Reference standards:
- ASTM B435 (sheet and strip)
- ASTM B572 (bars and wires)
- ASTM B366 (Flanges and Fittings)
- AMS 5537 (sheet metal)
- AMS 5759 (bars)
- AMS 5796, AMS 5797 (welding wires)
Chemical composition (%)
| Element | Content (%) |
|---|---|
| Cobalt (Co) | Balanced |
| Chromium (Cr) | 19.0 – 21.0 |
| Nickel (Ni) | 9.0 – 11.0 |
| Tungsten (W) | 14.0 – 16.0 |
| Iron (Fe) | 3.0 max |
| Carbon (C) | 0.05 – 0.15 |
| Manganese (Mn) | 1.0 – 2.0 |
| Silicon (Si) | 0.40 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
Mechanical properties
| Temperature (°C) | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 994 | 466 | 50 |
| 600 | 850 | 410 | 45 |
| 800 | 760 | 380 | 38 |
| 1000 | 680 | 340 | 30 |
Creep failure (1000 h)
| Temperature (°C) | Creep rupture (MPa) |
|---|---|
| 649 | 270 |
| 704 | 220 |
| 760 | 165 |
| 816 | 120 |
| 871 | 72 |
| 927 | 44 |
| 982 | 25 |
Heat treatments
- Solution annealing: 2150 – 2250°F (1175 – 1230°C), followed by rapid cooling in air or water to maintain optimum mechanical properties.
- Aging Treatment: Strain aging at 900°F to increase creep resistance.
- Hot Forming: Workable between 1900°F and 2300°F (1038 – 1260°C).
- Cold forming: Requires high processing forces and possible intermediate treatments to relieve stress.
Available formats
UDIMET® Alloy L 605 is available in the following forms:
Industrial applications
Thanks to its mechanical resistance to high temperatures and oxidation, UDIMET® L 605 is used in the following sectors:
- Aerospace and Defense: Components for combustion chambers, rings and blades of gas turbines.
- Power Generation: Coatings and components for industrial turbines.
- Chemical and Pharmaceutical Industry: Parts for high-temperature furnaces and aggressive environments.
- Motorsport: High-performance exhaust systems and components for racing engines.
- Nuclear: Structural components resistant to oxidation in radioactive environments.
- Oil & Gas: Coatings for refining plants and high-temperature pipelines.
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